Normalization ________ data duplication. eliminates reduces maximizes increases TRUE ANSWER : ? YOUR ANSWER : ?
One common design problem when designing a database from existing data is the presence of inconsistent values in the received data. True False TRUE ANSWER : ? YOUR ANSWER : ?
Read-only databases are ________ updated. seldom never always commonly TRUE ANSWER : ? YOUR ANSWER : ?
Each answer below shows example data from a table. Which answer is an example of the missing values problem? Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column. Three rows have the values Brown, NULL, and Blue in the same column. One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column. Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row. TRUE ANSWER : ? YOUR ANSWER : ?
We have normalized a table into BCNF if all candidate keys are determinants. False True TRUE ANSWER : ? YOUR ANSWER : ?
When building a database from an existing set of tables, we may safely assume that there are no multivalued dependencies in the data we are given. True False TRUE ANSWER : ? YOUR ANSWER : ?
We use the SQL construct COLUMNS(*) to determine the number and type of columns in a table. True False TRUE ANSWER : ? YOUR ANSWER : ?
Most of the time, modification anomalies cause problems that are severe enough that a table should be normalized into BCNF. True False TRUE ANSWER : ? YOUR ANSWER : ?